# Questions Asked onJanuary 28, 2013

1. What is the degree of the monomial 3x2y3? 2 3 5 6 2. What is the simplified form of 8b3c2 + 4b3c2? 12bc 12b3c2 12b6c4 12b9c4 3. What is the simplified form of (4j2 + 6) + (2j2 – 3) ? (1 point) (0) 6j2 – 3 (1) 6j2 + 3 (0) 6j2 + 9 (0) 4j4 + 3 4. What

2. ## physics

Both drawings show the same square, each of which has a side of length L = 0.86 m. An observer O is stationed at one corner of each square. Two loudspeakers are located at corners of the square, as in either drawing 1 or drawing 2. The speakers produce the

3. ## physics

A 0.10 kilogram ball dropped vertically from a height of 1.0 meter above the floor bounces back to a height of 0.80 meter. The mechanical energy lost by the ball as it bounces is aprox. a. 0.080 J b. 0.20 J c. 0.30 J d. 0.78 J

4. ## physics

A container holds 2.2 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 7.7x10-3 kg bullet with a speed of 650 m/s. What is the Kelvin temperature of the gas?

5. ## physics

An airplane flies 200km due west from city A to city B and then 305km in the direction of 33.5 degrees north of west from city B to city C. a.) in straight-line distance, how far is city C from city A? b.) relative to city A,in what direction is city C?

6. ## Math !...

Hi, Can You Please Help Me? What is the amount of sales tax owed on a \$39 jacket if the tax rate is 5%? \$1.85 \$1.90 \$1.95 \$195.00 (my answer) A flower arrangement was marked down 12.5%. If the flowers originally cost \$20, what is the amount of the

7. ## math

Unit rate 6 eggs in 7 days?

8. ## Pre-Calculus

For a boat to float in a tidal bay, the water must be at least 2.5 meters deep. The depth of the water around the boat, d(t), in meters, where t is measured in hours since midnight, is d(t)=5+4.6sin(0.5t) Use three decimal places in all intermediate

9. ## physics

A man in a maze makes 3 consecutive displacements. His first displacement is 5.40m westward, and the second is 18.0m northward. At the end of his displacement he is back to where he started. Use the graphical method to find the magnitude and direction of

10. ## Chemistry

Determine the partial pressure of oxygen collected by water displacement if the water temperature is 20.0 ◦ C and the total pressure of the gases in the collection bottle is 760 torr. PH2O at 20.0 ◦ C is equal to 17.5 torr.

11. ## Finite

the student wants to buy 3 CDs, but assume that there are 3 CDs featuring the piano, 5 CDs featuring the trumpet, and 7 CDs featuring the saxophone. (2) In how many ways can the selection be made if CD's featuring at least 2 different instruments are

12. ## chemistry

Which of the following compounds is expected to have the strongest interaction between its molecules? CO2, NO2, SO2, H2S

13. ## Physics

A car travels 20.2 km due north and then 31.3 km in a direction φ = 61.2◦ west of north. Find the magnitude of the car’s resultant displacement. Then Calculate the direction of the car’s resultant displacement, measured counterclockwise from the

14. ## math

The number of Roberto's baseball cards is 3/4 the number of David's cards. If Roberto gives 1/2 of his cards to David, what will be the ratio of Roberto's cards to David's cards?

15. ## Algebra

When is the substitution method a better method than graphing for solving a system of linear equations?

16. ## Pre-Calculus

The exponential function y(x)=Ce^ax satisfies the conditions y(0)=6 and y(1)=7. (a) Find the constants C and a. Enter the exact value of a. (b) Find y(2). Enter the exact answer. Simplify the answer so it does not contain any logarithms.

17. ## calculus 2

A tomato is thrown upward from a bridge 23 m above the ground at 40 m/sec. Take the acceleration of gravity be equal to 9.8 m/s^2 (a) Give formulas for the acceleration, velocity, and height of the tomato at time t. (b) How high does the tomato go, and

18. ## Physics

A 1000-kg car moving east at 80 km/h collides head-on with a 1500-kg car moving west at km/h, and the two cars stick together. (a) Which way does the wreckage move and with what initial speed? (b) How much KE is lost in the collision?

19. ## physics

Three point charges, +6.0 µC, +1.7 µC, and −2.3 µC, lie along the x-axis at 0 cm, 1.7 cm, and 6.0 cm, respectively. What is the force exerted on q1 by the other two charges? (To the right is positive.) The Coulomb constant is 8.99 × 10 9 N · m2 /C 2

20. ## Physics

A point charge (m = 1.0 g) at the end of an insulating string of length L = 46 cm (Fig. 16-66) is observed to be in equilibrium in a uniform horizontal electric field of E = 8800 N/C, when the pendulum's position is as shown in Fig. 16-66, with the charge

21. ## physics

Three point charges, +6.0 µC, +1.7 µC, and −2.3 µC, lie along the x-axis at 0 cm, 1.7 cm, and 6.0 cm, respectively. What is the force exerted on q1 by the other two charges? (To the right is positive.) The Coulomb constant is 8.99 × 10 9 N · m2 /C 2

22. ## Physics

Stephanie serves a volleyball from a height of 0.78 m and gives it an initial velocity of +7.7 m/s straight up. How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. How long will it take the ball to reach its maximum height?

23. ## Consumer Math

Can you please check my answers:) 1. John Gray bought a basic car for \$8,250.00, with options that cost \$324.00. There's a 6% sales tax in his state and a combined \$50.00 license and registration fee. What was John's total cost? A. \$9,138.44 B. \$10,000.00

24. ## physics

A near-sighted person might correct his vision by wearing diverging lenses with focal length f = 60 cm. When wearing his glasses, he looks not at actual objects but at the virtual images of those objects formed by his glasses. Suppose he looks at a

25. ## science

1. Which of the following is TRUE regarding this situation: Solution A has a pH of 7.38, and Solution B has a pH of 7.42? a.Solution B is more acidic than Solution A b.The pH of Solution A falls within the homeostatic pH range for extracellular body

26. ## American Gov't

The president's role in foreign policy increased largely because: A. Congress proved so inept in foreign affairs that the American people demanded a change. B. America became more of a world power. c. of the need to coordinate national economic policy and

27. ## physics

A 1100 wrecking ball hangs from a 10 -long cable. The ball is pulled back until the cable makes an angle of 28.0 with the vertical.By how much has the gravitational potential energy of the ball changed?

28. ## English; Help/Check.

What is the main idea of 'The Raven' by Edgar Allan Poe? The raven haunts the man while being awfully depressed by his long lost love.

29. ## english 1

what is the plot of 'new directions' by maya angelou?

30. ## English

What point is Tan making with the example of her mother and the hospital in Mother Tongue by Amy Tan 1990?

31. ## Physical Science

How much heat is needed to melt 100 g of ice at 0°C? A: 8000 B: 540 C: 7200 D: 100

32. ## math (trig.)

A ferris wheel is 35 meters in diameter and boarded at ground level. The wheel makes one full rotation every 8 minutes, and at time (t=0) you are at the 3 o'clock position and descending. Let f(t) denote your height (in meters) above ground at t minutes.

33. ## Physics

An elevator starts from rest with a constant upward acceleration and moves 1 m in the ﬁrst 1.7 s. A passenger in the elevator is holding a 6.6 kg bundle at the end of a vertical cord. What is the tension in the cord as the elevator accelerates? The

34. ## college chemistry

calculate the specific heat for 18.5-g sample of tin that absorbs 183 J when its temp increases from 35.0 degrees celcius to 78.6 degress celcius. I don't know where to even start, help?

35. ## ACCOUNTING

Gardner Manufacturing Company produces a product that sells for \$120. A selling commission of 10% of the selling price is paid on each unit sold. Variable manufacturing costs are \$60 per unit. Fixed manufacturing costs are \$20 per unit based on the current

36. ## math

EXPLAIN HOW YOU CAN BREAK 6X7 ARRAY IN TO SMALLER ARRAYS .WHAT ARE THE NEW FACTS?

37. ## Science; Solar System

True or False 5. The outer planets are small, rocky planets with iron cores. true false 6. It is unlikely that the sun formed alone. It probably formed with a cluster of stars like the sun. true false

38. ## Calculus

Write an equation for a graph obtained by vertically shifting the graph of y = x^2 + 10 downward by 35 units, followed by stretching the resulting graph by a factor of 19.6.

39. ## PHYSICS 1 ..lab helllpppppppp

1.described the motion of mud that flies off from a rapidly spinning wheel. 2.explain why the outer rail is higher than the inner rail of curve in a railroad track. 3. a 5kg mass is moving in a circle of a radius 3m at a speed of 30 m/sec.determine the

40. ## math

5 pounds of potatoes for \$2.19 equals what per pound?

41. ## Physics

An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain

42. ## CHEMISTRY

write the balanced ionic equation of K2CO3+HCl

43. ## math

Add two operational signs to make the equation true. 2 4 6 1 3=88

44. ## Chemistry

During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solutions' final volume is 100.0 mL, the density is 1.00 g/mL, and the specific

45. ## Physics

You weigh 526 N on earth. Planet X has twice the mass of Earth and the radius of Earth . What is your weight in newtons on planet X?

46. ## Biology

In a population of jaguars, a gene with two alleles encodes the fur color. Allele B causes melanism (dark fur) and is dominant over allele b, which results in light colored fur. Suppose that there is a migration event, producing a population with 60% BB,

47. ## Physics

A 0.35 m2 coil with 50 turns produces a maximum emf of 45 volts in a magnetic field of 0.4 Tesla. What is the speed of rotation of the coil? Can you show the steps too so I can understand? Thanks

A small spherical insulator of mass 8.96 10-2 kg and charge +0.600 μC is hung by a thread of negligible mass. A charge of −0.900 μC is held 0.150 m away from the sphere and directly to the right of it, so the thread makes an angle θ with the vertical

49. ## math

Mr. Anders wants to put a fence around his backyard. His backyard is rectangular. The lengths of the sides are 75 yards , 45 yards, 75 yards, and 45 yards. How much fencing will Mr. Anders need ?

50. ## Statistics

You have received a year-end bonus of \$5000. You decide to invest the money in the stock market and have narrowed your investment options down to two mutual funds. the following data represent the historical quarterly rates of return of each mutual fund

51. ## ap chemistry

At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2 SO2(g) + O2(g) *) 2 SO3(g) What concentration of SO3 would be in equilibrium with 0.250moles of SO2 and 0.853 moles of O2 in a 1.00 liter container at this temperature? Note:

52. ## ap chemistry

At 350 K, Kc = 0.142 for the reaction 2BrCl(g) *) Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.069 mol/L. What is the equilib- rium concentration of BrCl? Answer in units of M

53. ## Physics

An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is σ = 1.67 10-7 C/m2, and the plate separation is 1.35 10-2 m. How fast is the electron moving just before it reaches the

54. ## Math

susan spends 2 1/4 hours taking inventory and 1 1/2 hours restocking how many hours does susan work

55. ## math

what number is the same as 7 tens and 20 ones

I'm not very good at spanish. Will somebody please help? 4. Which expression is used to talk about what you have just done? A.) venir de B.) hacer la tarea C.) hacer un viaje D.) acabar de 5. Vengo de la clase. ¿Qué acabo de hacer? A.) Acabas de bailar.

57. ## Pre-Calculus

At time t hours after taking the cough suppressant hydrocodone bitartrate, the amount A, in mg, remaining in the body is given by A=13(0.82)^t. a) What was the initial amount taken? b) What percent of the drug leaves the body each hour? c) How much of the

58. ## College Chemistry

Upon decomposition, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.56kg of fluorine. A second sample produced 1.25kg of magnesium.How much fluorine (in grams) did the second sample produce?

59. ## Chemistry

​What is the point called on a graph of pH vs log {[A-]/[HA]} when [A-] = [HA]? Graphs are listed as “y vs. x”.

60. ## Calculus

In order to express the function y=12^19x+7 as a composition of two functions the outer of which is an exponential function,we would let u be equal to the inner function, u=19x+7, and then write y as a function of u, as follows: y= ??? . (b) In order to

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and

62. ## math

What is the lateral area of a pyramid whose base is a square with sides measuring 16 meters and with a slant height of 17 meters?

63. ## Physics

An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

64. ## math

In the statement 'If it is sunny Thursday, we will go to a ball game,' the phrase 'we will go to a ball game' is the ________

65. ## physics

A force Farrowbold1 of magnitude 5.00 units acts on an object at the origin in a direction θ = 34.0° above the positive x-axis. (See the figure below.) A second force Farrowbold2 of magnitude 5.00 units acts on the object in the direction of the positive

66. ## Chemistry

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride

67. ## energy

A boy weighing 350Newton runs up a flight of stairs consisting of 20 stairs each, 16 centimeter high in seconds, what ??\$ it's power?

68. ## math permutations

how many distinguishable permutations are there of the letters in the word effective

I need help explaining ratios and proportions to my 6th grader

70. ## physics

The security alarm on a parked car goes off and produces a frequency of 1370 Hz. The speed of sound is 343 m/s. As you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 147 Hz. At what speed are you driving?

71. ## chemistry

How many orbitals are contained in the n=2 level? Give the l and ml values of each of them.

72. ## Physics

A 250-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.8 ° below the horizontal. The coefficient of kinetic friction is 0.224. What should be the magnitude of P, so that the net work done by it and the kinetic

73. ## Math

Can you please check my answers:) 1. John Gray bought a basic car for \$8,250.00, with options that cost \$324.00. There's a 6% sales tax in his state and a combined \$50.00 license and registration fee. What was John's total cost? A. \$9,138.44 B. \$10,000.00

74. ## science

19. The term chromatin refers to a. the color of certain cells b. chromosomal DNA c. the fluid within the nucleus d. ribosomal RNA

75. ## Physics

A ball on the end of a string is whirled around in a horizontal circle of radius 0.486 m. The plane of the circle is 1.83 m above the ground. The string breaks and the ball lands 2.39 m away from the point on the ground directly beneath the ball’s

76. ## music

What is and orchestra and how do we know when the music is disjunct or conjunct

77. ## chemistry

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride

78. ## phy

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational

79. ## physics

A girl delivering newspapers covers her route by traveling 10.00 blocks west, 4.00 blocks north, and then 5.00 blocks east. a.) what is her resultant displacement? b.) what is the total distance she travels?

80. ## Physics

Two small balls each of mass 15g are fastened to the ends of silk threads 1m long each and hung from a common point. They attain equilibrium at a distance of 20cm from each other. If one ball has a charge of -0.6microC, what is the charge of the other

81. ## phy

1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the

82. ## Math

Students in Mr. Tandoc's shop class made a circular railroad crossing sign for a school play. The diameter of the sign was about 4 feet. How does the diameter compare to the circumference of the sign? A. The diameter is about 1/3 of the circumference B.The

83. ## math help

Brand x cost \$1.56 for 12 ounce. Brand y cost 2¢ more per ounce. What is the cost of 15 ounce of Brand y

84. ## Chemestry

How many moles of NaHCO3 are in a 44g sample?

85. ## Physics

A person standing at the edge of a seaside cliﬀ kicks a stone over the edge with a speed of 21 m/s. The cliﬀ is 52 m above the water’s surface. How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s^2.

86. ## math

Find the surface area of a cone if the diameter of its base is 13.5 feet, and it has a slant height of 16.8 feet. Round to the nearest tenth.

87. ## English

What are the adverb(s) in the following sentence The teacher seemed unusually cheerful. Is it unusually and cheerful?

88. ## Physics

A boat crosses a river of width 113 m in which the current has a uniform speed of 0.933 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 2.58 m/s

89. ## Physics

A ball on the end of a string is whirled around in a horizontal circle of radius 0.486 m. The plane of the circle is 1.83 m above the ground. The string breaks and the ball lands 2.39 m away from the point on the ground directly beneath the ball’s

90. ## physics

The mass of a string is 8.40 10-3 kg, and it is stretched so the tension in it is 225 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? m

91. ## science

What is the boiling point of a solution of 0.150g of glycerol in 20g of water? What is the freezing point?

92. ## mechanical properties of materials

following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length Load (kN) Elongation(mm) 5 0.005 10 0.015 30 o.048 50 0.084 60 0.102 64.5 0.109 67 0.119 68 0.137 69 0.160 70 0.229 72 0.300 76 0.424 84

93. ## PHYSICS (most is worked)

A glass ball, ball A, of mass 6.0 g moves at a velocity of 18.0 cm/s. It collides with a second ball, ball B, of mass 8.0 g, moving along the same line of velocity of 11.0 cm/s. After the collision, ball A is still moving, but with a velocity of 10.0 cm/s.

94. ## geometry

sodium has a body-centered cubic structure with a unit cell that is 430 picometers wide. estimate the radius of a sodium atom. please help me, I don't know how to get the solution. THank you

95. ## Math

It is estimated that residents in 60% of households in town own a digital camera. If 10 homes are randomly selected, what is the probability that no more than 5 own digital cameras?

96. ## Physics

A block of mass 12 kg starts from rest and slides a distance of 8 m down an inclined plane making an angle of 40◦ with the horizontal. The coeﬃcient of sliding friction between block and plane is 0.4. The acceleration of gravity is 9.8 m/s^2 What is

97. ## intermediate math

the length of a rectangular plot of land is 4 times the width. of the perimeter is 600 feet, find the dimensions of the plot

98. ## Chem hwk

In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium sulfate can be produced if you start the reaction with 18.97 grams of calcium chloride and the reaction goes to completion?

99. ## English 1/ or literature

What is a example of a understatement in the cask of amontillado.? I know a understatement is a form of speech which contains an expression of less strength than what would be expected. I really need help with this. Thanks :)

100. ## Physics super difficult for me

Two small balls each of mass 15g are fastened to the ends of silk threads 1m long each and hung from a common point. They attain equilibrium at a distance of 20cm from each other. If one ball has a charge of -0.6microC, what is the charge of the other

101. ## Calc 2

Evaluate the definite integral from 0 to 1 of (x^2)sqrt(5x+6)dx

102. ## math

Fifty students were surveyed about their favorite food. A student is selected at random. Based on the survey results, what is the probability that this student will choose Taco as their favorite food?

103. ## Calculus/Algebra

Let the demand and supply functions be represented by p=D(q) and p=S(q), respectively, where p is the price per item in dollars and q is the quantity of items. D(q) = 42-.03q S(q) = .02q -20 Find the equilibrium price. Hint: you will first find the

104. ## maths

ABCD is a quadrilateral. P,Q,R, and s are the mid Points of AB, BC, CD and DA respectively . Show PR and QS bisects each other.

105. ## Chemistry

Determine the normality of 91.2 g of HCl in 4.3 L of solution. (Round to the nearest hundredth.)

Make up a set of at least 12 numbers that has the following landmarks: Minimum: 50 Maximum: 57 Median: 54 Mode: 56

107. ## Government Budgeting

Evaluate how public policy decisions affect the receipt of revenues

108. ## dress making

im pretty sure im right on most the question, just wanna make sure before i submit!! help Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would

109. ## phy

1 Physical quantities such as length, mass, time and temperature are referred to as vector quantities fundamental quantities scalar quantities derived quantities 2 The following are examples of vector quantities except displacment velocity accleration

110. ## physical sciences

Imagine a circle with a diameter of 2km.if this represents an atom ,which answer would best represent the nucleus?choose the correct answer:a table tennis ball(diameter;2cm)atennis ball(diameter;7cm)avolley ball(diameter;20cm)a soccer ball(diameter;25cm)

111. ## Physics

A tomato is thrown upward from a bridge 23 m above the ground at 40 m/sec. Take the acceleration of gravity be equal to 9.8 m/s^2 (a) Give formulas for the acceleration, velocity, and height of the tomato at time t. (b) How high does the tomato go, and

112. ## mechanical properties of materials

following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length Load (kN) /Elongation(mm) 5 /0.005 10 /0.015 30 /0.048 50 /0.084 60 /0.102 64.5 /0.109 67/ 0.119 68 /0.137 69/ 0.160 70 /0.229 72 /0.300 76

113. ## Education

Assimilationist ideology supports the idea that the schools should serve to homogenize newcomers at the best possible speed. True or False? I want to say true, but would like a second opinion.

114. ## Chemistry

The term mole is used in chemistry to define an amount of a substance. For example, a mole of glucose, blood sugar, weighs 180.16 grams. A common concentration unit for solutions is moles of substance per liter of solution. We abbreviate this with the

115. ## Human Resources

Do the predictors of union participation suggest that union leaders will likely be involved in an adversarial relationship with management? Please use reference material.

116. ## Math

Leroy borrowed \$8250 to be repaid after 3 years at an annual simple interest rate of 7.25%. How much interest will be due after 3 years? How much will Leroy have to repay? How do I set this up?

117. ## mechanical properties of materials

following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length Load (kN) /Elongation(mm) 5 /0.005 10 /0.015 30 /0.048 50 /0.084 60 /0.102 64.5 /0.109 67/ 0.119 68 /0.137 69/ 0.160 70 /0.229 72 /0.300 76

118. ## mechanical properties of materials

A steel cable of length 10 m and cross-sectional area 1200 mm2 is loaded with an object of weight 30 kN. Given that the cable is not loaded beyond its proportional limit and Young's modulus of steel is 210 GPa, draw a stress-strain curve for the loaded

119. ## Guidance and Discipline

Suppose a child has knocked down another`s block tower. To encourage ,a teacher or caregiver may ask the question,"Were you being careful of Sue`s tower when you drove your race car so fast through the block area?"

120. ## Chem

I'm supposed to pick three that are true, and my personal guesses are 2, 3 and 6. I'd love to know if these are right and if so, why are they right. If not, could someone possibly lead me in the right direction? 1. Leu-Glu-His-Val-Cys-Lys-Ser is a likely

121. ## Physics

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and

122. ## high shoool algebra

Joy is 20 years older than Bob. Three years ago, Joy was 5 times as old as Bob. How old are they now?

123. ## MicroEcon

Suppose that you supply bottled water in a competitive market and that you are producing the profit-maximizing quantity of bottled water. If you can sell your water at \$2 a bottle and you currently employ five workers at a wage of \$50 a day, what is the

124. ## Algebra

How do I work this problem? "Susan is 9 years older than Karen. In 10 years Karen will be 2/3 Susan's age. How old will the two girls be in 10 years?"

125. ## mechanical properties of materials

A cylindrical steel bar is required to support a load of 650 N. the required bar must be 0.17 m in length and must not deform by more than 0.015 mm. given that the Young's modulus of steel is 210 GPa, calculate the minumum diameter of the bar.

126. ## Physics

Two spheres are placed at a distance of 10 m from each other. The force of gravity between them is 6.673x10 to the (-9)N. If one of the spheres is 4 times as massive as the other what are their masses in Kg?

127. ## Math

It is estimated that residents in 60% of households in town own a digital camera. If 10 homes are randomly selected, what is the probability that no more than 5 own digital cameras?

128. ## math

It takes Kaeden 6 min to type two-thirds of a page. At this rate, how long will it take him to type a 5-page report?

129. ## scocial studies

how did imperialism, nationalism and militarism lead to WW1

130. ## Engineering Math

A Theme Park site is being designed. It will occupy a rectangular piece of land 800m by 600m. There are to be 4 particularly noisy rides. The ‘Drumbeat’ uses music which reaches a level of 95dB(A). The ‘Bigdrop’ generates screams which can reach

131. ## Physics!

Ms. Anderson shoots an arrow straight up into the air. The arrow leaves her bow at 1.2[m] above ground, and reaches a height of 95 feet above ground. It then falls down and penetrates 14 inches into the ground. Find: a) The velocity of the arrow just

132. ## maths

A rectangular paddock is 164 metres long and 95 metres wide. How many metres of fencing are required to enclose the area?

133. ## Physics

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?

134. ## mechanics of materials

A steel beam with a rectangular cross section is bent to form an arc of a circle of radius 6 m. Calculate the maximum stress in the beam given that the depth of the beam is 6 mm and the Young's modulusfor steel is 210 MPa

135. ## College Algebra

Hello I need help with this problem. I need to identify if the equation is identity, contradiction, or conditional equation. -(5x-3)+2x=11-4(x+2)

Number the items to show the most effective and the least effective to use to scratch the mineral to test its hardness. Use number 1 for the most effective and the 4 for the least efective. Chalk(1) Fingernail(2) Steel screw(4) Paper clip(3) Am I

137. ## Math

Are there more rational or irrational numbers? I am thinking irrational, because the product of a rational and irrational number is irrational. Is this enough of a reason to prove it?

138. ## physics

An athlete executing a long jump leaves the ground at a 32.3 angle and travels 7.84 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be?

139. ## mechanical properties of materials

A cylindrical steel bar is required to support a load of 650 N. the required bar must be 0.17 m in length and must not deform by more than 0.015 mm. given that the Young's modulus of steel is 210 GPa, calculate the minumum diameter of the bar.

140. ## Physics

The mass of an object at the earths surface is 100 kg. Calculate the force of gravity of the same mass if it is moved a distance of 4 radii from the earths centre.

141. ## Chemistry

In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.

142. ## Physical science

An object is on a horizontal surface,three force act horizontal on the object.3N to the left,12N to the right,in to the left.at the same time,another three force act vertically on the object,4N upwards,10N downward,2N downwards determine the resultant

143. ## Physics

A spring with an unstrained length of 0.066 m and a spring constant of 2.3 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 4.84 10-3 kg and

144. ## langauge arts - mr. sue help!!

25. Select one story from the unit and identify the dynamic and static characters. For each character, identify why you labeled the character as either dynamic or static. (10 points)

145. ## Physics

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?

erins summer vacation lasted 100 days. she kept track of the number of rainy days. it rained on 30 days. write a fraction and an equivalent fraction to show what part of all the days it rained.

147. ## physics

a squirt gun is tied to a string and released when it is 1 meter above the ground. the mass of the gun is .1kg. what ist its initial PE? 1Joule what is its PE when it has fallen to .75meters? .75 J What is its KE at this point? .25 J What is its velocity?

148. ## Physics

Two charges are placed on the x axis. One of the charges (q1 = +9.3 µC) is at x1 = +3.4 cm and the other (q2 = -20 µC) is at x2 = +8.9 cm. (a) Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the

149. ## Physics

A small object, which has a charge q = 6.7 µC and mass m = 9.60 10-5 kg, is placed in a constant electric field. Starting from rest, the object accelerates to a speed of 2.06 103 m/s in a time of 1.03 s. Determine the magnitude of the electric field.

150. ## Social studies

Europeans unknowlingly carried diseases such as smallbox measles and influenza to which native americans had no immunity. Can you please tell me the significance of the word immunity???

151. ## Physical science

An object is on a horizontal surface,three force act horizontal on the object.3N to the left,12N to the right,in to the left.at the same time,another three force act vertically on the object,4N upwards,10N downward,2N downwards determine the resultant

152. ## math

What is an example of a quintic polynomial function that has exactly four zeros?

153. ## math

galileo showed that objects of different weights fall at the same velocity by dropping 2 objects of different weight form the top of the leaning tower of pisa. a model for the heigh h in feet of an object dropped from an initial h0 feet is h=16t^2+h0,

154. ## PHYSICS

Ms. Anderson shoots an arrow straight up into the air. The arrow leaves her bow at 1.2[m] above ground, and reaches a height of 95 feet above ground. It then falls down and penetrates 14 inches into the ground. Find: a) The velocity of the arrow just

155. ## physics

The speed of a transverse wave on a string is 470 m/s, and the wavelength is 0.1 m. The amplitude of the wave is 1.6 mm. How much time is required for a particle of the string to move through a total distance of 1.0 km?

156. ## Analytical Chemistry

The question: The pH of a solution is defined as pH = -log[H3O+]. If the pH of a solution is 3.72(+/- 0.03), what is the [H3O+] and its absolute standard deviation? Answer: How would I carry this out? I know to find the hydronium concentration wouldn't i

157. ## mechanical properties of materials

A steel cable of length 10 m and cross-sectional area 1200 mm2 is loaded with an object of weight 30 kN. Given that the cable is not loaded beyond its proportional limit and Young's modulus of steel is 210 GPa, draw a stress-strain curve for the loaded

158. ## Physics

Two particles, with identical positive charges and a separation of 2.65 10-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration 1 whose magnitude is 4.25 103 m/s2, while particle 2 has an acceleration 2 whose magnitude

159. ## Math

What is the relationship between addition and subtraction?

160. ## Physics

Suppose the battery on your phone delivers a current of 0.740 mA (that's milliAmperes) over a time of 4.00 hours. What is the total charge that flows out of the battery during this time? AND How many electrons flow out of the battery during this time?

161. ## math

ms.Perez has 24 pieces of fruit 1/2 are oranges,1/4 are mangos,2/8 are pineapple. How many oranges are there. How many mangos are there? how many pineapples are there?

162. ## Science 8R - HELP!

any drawing?? a simple rube goldberg diagram that shows six simple machines i need it for my project

163. ## physics

Find the coefficient of static and kinetic friction of a block on a table surface. The mass of the weight is 200g and with the friction block overall the mass is 0.3 kg. With a spring scale we found Fs to be 1N and Fk to be 0.8N. Draw free body diagram.

kira's winter break lasted 10 days. it snowed on 6 of those days. write a fraction and an equivalent fraction to show what part of all the days it snowed.

165. ## Calculus

lim 1/(1+h)^2-1/h h->0 I have 1 as my final answer and was wondering if i was correct

166. ## mechanics of materials

A hollow circular shaft has an external diameter of 160mm and an internal diameter of 120mm. Calculagte the polar second moment of areaof the shaft and the maximum and minimum shear stress produced when the applied moment is 40kN m.

167. ## math

What is the opposite of subscription

168. ## english

What is a example of a understatement in the cask of amontillado.? Is one "my heart grew sick, it was the dampness of the catacombs that made it so" a understantment in this story? PLEASEE HELP ASAP!!

169. ## Math

Jacob bought a sandwich for \$4.75, a small salad for \$1.25. Jacob wrote the expression \$4.75 + (\$2.43 + \$1.25) to calculate how much money he spent. Use the Commutative Property and the Associative Property to find how much Jacob spent.

170. ## Physics

Mr. Anderson shoots an arrow straight up into the air. The arrow leaves her bow at 1.2[m] above ground, and reaches a height of 95 feet above ground. It then falls down and penetrates 14 inches into the ground. Find: a) The velocity of the arrow just

171. ## Physics

A 1200kg car accelreates from 0mph-60mph in 8.5 seconds. Calculate the force needed to accelerate the vehicle.

172. ## math help!

how to find the points thought which the function goes like if the vertex is 2,5 and it goes through (6,-1) how would i find the other point?

173. ## pre-calc

The sum of two numbers is radical 3. Find the largest possible value for their product

174. ## Biology

In a lab experiment, we experimented with 1% glucose solution and Sorenson's solution to determine pH levels and whatnot; the other part of the lab was to determine which one, if either, was a buffering solution. According to the notes my instructor gave

175. ## Math

Chloe and Nick are meeting at the library. The library is 4.61 kilometers from Chloe's house and 3.256 kilometers from Nick's house. How much farther, in kilometers, will Chloe walk than Nick?

176. ## phy

A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the

177. ## science

Describe the body’s stress response in terms of the actions of the adrenal cortex and medulla. What are the different hormones involved, where are they produced, what type of gland produces them, what type of chemical are they, and how do they contribute

178. ## Physics

A solid gold bathtub (mass=250 Kg)is pushed along a horizontal cement road (mew=0.59)by criminals. The criminals, in fear of capture, run away and leave the bathtub sliding with a velocity of 9 m/s. Assuming all kinetic energy is converted to heat from

179. ## math help

The curtis car traveled an average of 21 miles per gallon of gas. At that rate how far could the car travel on a full tank of 21 gallons

180. ## physical science

A tractor pulls a tree trunk across horizontal piece of ground. If the force in the chain is 3000N and the chain forms an angle of 30 degrees with the group , calculate 1the force with wch the tree is pulled across the ground 2 the force with wch the tree

181. ## social studies

I need help on these questions: John ________, (John) Adams And Paul Revere were all leaders of the ________ ____ _________. To help fight the colonists, King George III hired ___________ from ____________.

182. ## mechanics of materials

A steel bar with a cross sectional area of 25cm2 is found to shear fracture when subjected to a tensile load of 400kN. calculate the limiting shear stress of the bar.

183. ## Math

Which value is not equal to the absolute value of -50. A) |50| B) |-50| C) 50 D)-50

184. ## math

If a hiker walks trail B (1 mile in length) at 6 mph and trail C (3 mils in length) at 2 mph, what is the hiker's overall average speed, in mph, for hiking on the two trails?

185. ## math

the bridge was built, the wood contained 15 grams of carbon-14. How much carbon- 14 would it have contained when it was found by the archaeologists? Round to the nearest hundredth

186. ## Physics

A solid gold bathtub (mass=250 Kg)is pushed along a horizontal cement road (mew=0.59)by criminals. The criminals, in fear of capture, run away and leave the bathtub sliding with a velocity of 9 m/s. Assuming all kinetic energy is converted to heat from

187. ## Physical science

A box with a mass of 2,ookg rests on a horizontal surface.Calculate the maximum static friction if ms=0,4oo

188. ## World civilizations

Although most students begin by assuming settled farming life was better than that lived by hunter-gatherers, closer acquaintance with full Paleolithic Hunter-Gatherer life shows us many aspects that could be considered easier than that of very early,

189. ## Religion

Hi. How does faith, charity and hope show leadership and service. I know the definitions to these words but i don't get how they connect to leadership and service. Please help

190. ## physics

a person walks 13.0 degrees north of east for 3.80km. How far due north and how far due east would she have to walk to arrive at the same location?

191. ## HUman Resources

1. Unions did you find that you already had a basic understanding of Unions or was the information somewhat foreign to you? 2. What do you think you will be most interested to learn more about, regarding Unions, and why? 3. Answer question 5 on page 58

192. ## Math

There are 12 girls on a gymnastics team. Less than 1/4 of the girls are in second grade. How many girls on the gymnastics team could be in second grade?

193. ## math 4th

How much greater than 25kilogram is 31 kilogram?

194. ## math help

At 9:00 a.m. marsha found a parking meter that still had 5 minute until it expired. She quickly put a quarter, 1dime, and a nickel into the meter and went to her meeting. If 5¢ buys 15 minute of parking time, at what time will the meter expired

195. ## math help

Fifty four million, seven hundred thousand is how much greater than five million, eighty nine thousndths. Write the answer in words

196. ## calculus

find the derivative of: g(x) = interal(a=7x, b=6x) (u+5)/(u-5) du Hint: interal(a=7x, b=6x) (u+5)/(u-5) du = interal(a=0, b=6x) (u+5)/(u-5) du + interal(a=7x, b=0) (u+5)/(u-5) du

197. ## algebra

Jet #1 leaves an airport at 600 km/h. Jet #2 leaves 3/4 hour after jet #1 in same direction. How long until jet #2 overtakes jet #1

198. ## Pre-Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form rounded to three decimal places. 1=21tan(2x+2)-6

199. ## life orantaion

What is a doctor?

200. ## math

Find a subset of R^2 which is not of the form AxB where A and B are subsets of R.

201. ## pre-calc

The sum of two numbers is radical 3. Find the largest possible value for their product

202. ## Math

Jacob bought a sandwich for \$4.75, a small salad for \$2.43, and juice for \$1.25. Jacob wrote the expression \$4.75 + (\$2.43 + \$ 1.25) to calculate how much money he spent. Use the Commutative Property and the Associative Property to find how much Jacob

203. ## pre-calc

Suppose the function p= -1/8 x + 100 (0 grtr&= x ~12) relates the selling price p of an item to the quantity x that is sold. Assume that p is in dollars. What is the maximum revenue possible in this situation?

204. ## math

What is 1/8 divided by 5?

205. ## maths

list the following in order of size starting with the smallest. 1/3, 0.3, 0.29, 32%

206. ## problem solving

three digit odd number divisible by 9 digits in consecutive order and digit in hundreds place is greater than the digit in the ones place?

207. ## math

there are nine flowers 1/3 are daisies 1/3 are roses the rest are tulips

208. ## math

a person invested 1,200.00 at 7% interest for 6 years. how much interest did he receive?

209. ## math

what is an example or a quintic function with exactly four real zeros?

210. ## math

A car rental charges \$25 a day plus.15 a mile for a compact car.Tess owes \$61.40 for a two day rental. Which equation could be used to find the number of miles she drove.

211. ## Calculus/Algebra

your company produces designer dog-leashes. the marginal costs are \$4.50 per leash and each leash is sold for \$12.00. You need to produce and sell 75 dog leashes per month in order to break even. Based on this information, what are your monthly fixed

212. ## Religion

What's a good life in today's society? Some people think a good life is having money, family and friends. I do not know how else to describe what a good life is in TODAY'S SOCIETY

213. ## Math

I can't figure it out but heres the story problem. "Speedy printing charges \$30 for 200 deluxe business cards and \$45 for 500 deluxe business cards. Calculate the cost for printing 700 deluxe business cards.

214. ## College Chemistry

How many moles of aluminum do 2.66×10^24 aluminum atoms constitute?

215. ## Chemistry

how many half lives have passed if only 0.625g remain of the original 40g?

216. ## chem

if a 240mg of an acid H2A required 50.0ml of 0.10M NaOH for complete neutralization, what is yhe equivalent weight of the acid? what is its molecular weight?

The curtis car traveled an average of 21 miles per gallon of gas. At that rate, how far could the car travel on a full tank of 21gallons

218. ## Math

Sean bought a music CD which had 5 tracks on it. The table lists the music tracks and their times Track 1 3min 16sec Track 2 5min 27sec Track 3 4min 18sec Track 4 5min 33sec Track 5 6min 2sec BAsed on the table how long will it take Sean to listen to all

219. ## physics

an electron (m= 9.11 x 10^-31 kg) and a proton (m+ 1.6 x 10^-27 kg) are separated by 1.0 x 10^-10 m. what is the gravitation force between them? help please!

220. ## maths

Cn-4= 15 find n?

221. ## Math

six pencils cost \$1.32.At this rate,how much will 5 pencils cost?

222. ## Math

You are playing Guess you card with (3) other players. Here is wha you see: Andy has the cars 1,5, and 7 Belle has the cards 5,4, and 7 Carol has the cards 2,4, and 6 Andy draws the question card, " do you see two or more players whose cards sum to the

223. ## maths

A three digit number is multiplied by a 2 digit number and answer is a natural number. How o solve this and logic for this thanks

224. ## Analytic Geometry

Find the equation of a circle passing through (-1,6) and tangent to the lines x-2y+8=0 and 2x+y+6=0. Please I really need your help. I just do not know what to do.

225. ## algebra

formula of y=x to the power 2 divided by 4c

226. ## math

p=3000 a=3180 plus 1yr simple interest rate=r tothe nearest tenth percent

227. ## human resources

Discuss the pay and compensation you receive at your most recent place of employment and what aspects of compensation are most important to you? How important is direct pay and bonuses?

228. ## math

1/2x^2=x/4+1 how can i solve that with quadratic formula?plz i need the solution fast.

229. ## us history

who developed the first fiscal plan?? was it hamilton and who was the author of the great compromise in constitution? was it madison

230. ## chemistry urgent urgent

... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement.

231. ## APA Citation

In our annotations what do we write? I don't understand how to do it. Thanks!

232. ## math

What is an example of a quintic polynomial function that has exactly four zeros?

233. ## Chemistry

# of moles of oxygen in 2 L @ 24 deg C & 750 torr?

234. ## math

point of symmetry? 2(x-7)(X+3) and vertex?

235. ## math

Josephine deposited 8,000 in an account that pays 6% compounded annually. What is her investment at the end of 3 years

236. ## math

write the hidden question or questions in the problem Billy Bob wins \$500 in a school raffle. He decides to keep \$120 for himself, give \$60 to charity, and divide the rest equally among his 5 brothers & sisters. How much will each brother zor sister

237. ## ICD 9 CM

Patient Y, a 70-year-old woman, presents to your office two days after a syncopal episode. She had walked to the bathroom at 4 a.m., and as she walked back, she rapidly became lightheaded. She grabbed at the near corner of the bed, but ended up falling

238. ## math problem. help

triangle base is (4-x)cm and its height is (2x+3)cm.what will be the maximium area?

Why are there so many different interest rates? What do each type mean, and what are the differences?

Dimensional Analysis How do you go from 50 kg/m to g/cm?

241. ## pre-calculus

let f(x)=x^2 -(a^2 + 2a)x + 2a^3, where 0

242. ## math

What do you get when you double 1/8?

243. ## math

mark recently completed a math course in which he took three tests. his scores were 80,75,85 each time out of 100 points. What score represents marks total achievement in the course?

244. ## ELA

If an article has many examples of things that are given from people, are the examples from people still considered a source???

245. ## math help

Six hundred ninety four ten thousndths is how much more than fifty seven thousndths? Write the answer in words

246. ## math 4th

How much greater than 25kilogram is 31 kilogram?

247. ## chem

draw the approximate curve for a 25ml 0.10 M weak acid HA (K=1x10^-6) that is titrated with 0.10 M NaOH

248. ## math

Jamie and Bryce each have a bag of candy containing 40 gumballs that are either red or blue. The ratio of red to blue gumballs in Jamie's bag of candy is 1:3, and the ratio of red to blue gumballs in Bryce's bag of candy is 1:4. How many more red gumballs

249. ## Math

My son is struggling with ratios and Ploygons. The word problem is: Lydia wants to use a photocopier to increase the size of a small chart. The chart is 4 in. by 5 in. If she uses a scale factor of 5:11 will the chart fit on a 8 1/2 x 11 sheet of paper?

250. ## chemistry

When 4.167 g of a unknown compound is added to 34.1 g of a particular solvent, the freezing point of that solvent decreases by 0.8 °C. Determine the molar mass of the unknown compound. (The freezing point constant of the solvent is 2.82 °C/m).

251. ## Math

Test Axioms, What are the diagonals of a rectangle?

You have \$2.75 in dimes and quarters, and you have a total of 17 dimes and quarters. How many of each type of coin do you have?

253. ## math 121

jennifer is asked to complete 5 of the 7 essay questions on her literature exam how many choices does jennifer have?

254. ## Math

f(x)=x+4; f(x^2), (f(x))^2

255. ## mechanics of materials

A steel bar with a cross sectional area of 25cm2 is found to shear fracture when subjected to a tensile load of 400kN. calculate the limiting shear stress of the bar.

256. ## Calculus

lim e^(1+h)-e/h h->0

257. ## Science

In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.

258. ## alphabetize

How do you alphabetize(using the actual number) 7 and 150?

259. ## math

how do i mutiply and divide yrd, inches, and feet

260. ## math

How much is 2/8

261. ## math

How much is 2/8 out of 24

262. ## Math

Sally bought 3 tickets to the observation deck at the top of a skyscraper. She paid with a five-dollar bill and got 50 cents change. What was the cost of each ticket?

263. ## perimeter and area fractions

find the pereimeter and area for 9 /2/3 a fraction

264. ## Human Resources

Discuss the pros and cons of pay for performance systems and if you agree or disagree with the system and why. Give examples of organizations or professions that employ this type of pay system.

265. ## Engineering Math

A Theme Park site is being designed. It will occupy a rectangular piece of land 800m by 600m. There are to be 4 particularly noisy rides. The ‘Drumbeat’ uses music which reaches a level of 95dB(A). The ‘Bigdrop’ generates screams which can reach

266. ## math

how do you solve a question like this: (0,1,3,4) (-3,1,9,13

267. ## Algebra 1

sqrt5 -1/x = sqrt5/2 i cross multiplied and i got 3.5= 2.23x is that right?

268. ## mathematics sequence and series

You hv been given n=2 an Tn=5,n=3 an Tn=7,n=4 an Tn=9,n=7 an Tn=A,n=10 an Tn=21,n=B an Tn=153 determine A and B help please

270. ## math help

Write 5.62*10^5 in standard form

271. ## socialstudies

during which time peroid is the bourbon trimvirate accociated?

272. ## Math

Rational exponents 8^2/3?

273. ## Calculus

Let h(x) = 4x^2 + 2 x + 2. Let g(x) = 3√{x} + 1 (This is the third square root plus 1) (a) g(h(x)) = (b) h(g(x)) = (c) h(h(x)) = (d) g(x) + 1 = (e) g(x+1) =

274. ## writing

Edit mMath Autobiography Theresa V. Monteiro MAT 095 11:00 AM – 12:15 PM My name is Theresa and I am from Norwalk Connecticut. I’ve been living here for a year now. I moved to New London Connecticut to start my life. I’ve taken care of all my

275. ## math

How would i do 5-4x equals -11

276. ## moroka

What is a doctor?

277. ## math

which expression is equivalent to 5a+8-2(a+4)?

278. ## ms sue

triangle base is (4-x)cm and its height is (2x+3)cm.what will be the maximium area?

2cm-25cmm=

2m-25cm=

281. ## math

reduce the following to their lowest term 18/27, 85/119, 58/87, 75/120, 39/52

282. ## Chemistry

a sample of silver chromate has a mass of 78.6 grams?

283. ## math help!

how to find the x intercept of d(x)=9x^2-4x+7

284. ## math

2x-y=9 x+2y=7

285. ## Math

negative exponents 16^-3/4?

286. ## math

f(x)=2 |x-2| ; f(-2), f(x^2+2)

287. ## math

f(x)=2 |x-2| ; f(-2), f(x^2+2)